Another with Belgian proofmarks
The Perron should be on both the action and barrel flats
“Parkers” made in Belgium including Parker-Smith-Williams, T. Parker, Thomas Parker (possibly by Pieper), and C. Parker & Co.,
T. Parker New York were made by Crescent,
E.D. Parker shotguns with English proofmarks were listed in the 1895 Clabrough & Golcher catalog,
William Parker was a gunmaker from 1790 until 1840 and one of the forerunners of Parker, Field & Sons, High Holborn, London, 1841-1876,
The lowest grade guns marketed by P. Webley were sold under the name of Thomas Parker, London c. 1900-1920
http://parkerguns.org/pages/faq/IsMyGunParker.htm